<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var str = "这是一个字符串";
        var str1 = str + "aaaa";

        var str2 = `${str}啊啊啊啊`;

        console.log(str1,str2);

    </script>
</body>
</html>